user
Describe the color wheel and the color spectrum.
assistant

The color wheel is a visual representation of the spectrum of colors that are visible to the human eye. It consists of 12 main colors: red, orange, yellow, green, blue, and purple, and tints and shades of each. The color spectrum is divided into a range of wavelengths that humans are able to see. In order for a color to be visible, it must be within the visible spectrum of light.